Festoon-sewing machine



Jumw W, 193% K. MAIER FESTOON SEWING MACHINE Filed Sept. 22, 1926Sheets-Sheet l WWII llllm fi r WW C Filed Sept. 22, 1926 14 Sheets-Sheet2 Jam W, 1930, Y K. MAIER 1,762,479

- FESTOON SEWING MACHINE Filed Sept. 22, 1926 14 SheetsSheet 3 June 10,1930. K. MAIER FESTOON SEWING MACHINE l4 Sheets-Sheet 4 Filed Sept. 22,1926 June 1@, 1930;

K. MAIER FESTOON S EWING MACHINE Filed Sept. 22, 1926 14 Sheets-Sheet 5I o H13 June 10, 1936. K. MAIER L72A79 FESTOON SEWING MACHINE Fil edSept. 22, 1926 14 Sheets-Sheet 6 June 10, 1930. K. MAIER FESTOON SEWINGMACHINE Filed Sept. 22, 1926 14 Sheets-Sheet June 10, 1930.

K. MAIER FESTOON SEWING MACHINE 14 Sheets-Sheet 8 Filed Sept. 22, 1926a3 .w. gag Hui Q a X wi June 10, 1930. K. MAlER FESTOON SEWING MACHINEFild Sept. 22, 1926 14 Sheets-Sheet 9 June 10, 1930. MAIER 1,762,479

FESTOON SEWING MACHINE Filed Sept. 22, 1926 14 Sheets$heet l0 June 10,1930. MAIER 1,762,479

FESTOON SEWING MACHINE Filed Sept. 22, 1926 14 Sheets-Sheet 11 June '10,1930.

K. MAlER 1,762,479

FESTOON SEWING MACHINE Filed Sept 22, 1926 14 Sheets-Sheet 12 June 10,1930. K. MAIER FESTO-ON SEWING MACHINE Filed Sept. 22 1926 14Sheets-Sheet l3 June 10, 1930. MAlER 1,762,479

FESTOON S EWING MACHINE Filed Sept. 22, 1926 14 Sheets-Sheet l4 PatentedJune 10, 1930 UNITED STATES PATENT OFFICE KARL MAIEB, OF STUTTGART,GERMANY, ASSIGNOR TO UNION SPECIAL MASCHINEN- FABRIK, GESELLSCHAFT MITIBESCHRANKTER HAFTUNG, OF STUII'GAILT, GER- MANY FESTOON-SEWING MACHINEApplication 11106. September 22, 1926, Serial No. 187,046, and inGermany October 21, 1925.

The invention relates to new and useful improvements in afestoon sewingmachine,

' and moreparticularly to the mechanisms for providing the fabric edgeand for covering the cut edge with stitching threads.

An object of the invention is to provide a sewing machine of the abovecharacter wherein the fabric is trimmed so as to form a scalloped edge,and the edge is covered with interlooped stitching threads as it is cut.

A further object of the invention is to provide a machine of the abovetype wherein the fabric is fed in a straight line during the trimming ofthe fabric to form the scallops and during the covering of the cut edgewith the interlooped stitching threads.

A further object of the invention is to provide a machine of the abovecharacter wherein the cutting devices are moved laterally of the feed bymeans which is independent of the means which gives the stitchingmechanism alateral movement relative to the feed,

so that the seam line may be properly adjusted relative to the trimmingline to secure a uniform coverin of the cut edge.

A still further object of the invention is to provide a cutting devicefor scalloping theedge of the material which is so arranged that it maybe rotated about its axis, as well as moved laterally of the line offeed, and thus the cutting member set for the cutting of the desiredpattern. 7

A further object of the invention is to provide a machine of the abovetype wherein the controlling devices for the cutter are so arranged thatthe knife after its last cut on one scallop may be quickly brought backto a position to begin the following scallop.

These and other objects will in part be obvices and will in part behereinafter-more fully disclosed.

In the drawin s- Figure 1 is a ront elevation of the sewing machineembodying the invention;

Fig. 2 is aperspective view of the machine from in front and above, withthe seam formation in the machine beneath the presser foot' Fig. 3 is aview partly infront elevation and partly in vertical section, showingparticularly the upper and lower driving shafts and the means foroperating the same;

Fig. 4 is a horizontal section on the line A-A of Fig. 3; with partsbroken away to show the means for operating the pattern cams from thedriving shaft;

Fig. 5 is a horizontal sectional view on the l ne B-B of Fig. 3, andshowing in broken lines the cover plate used in connection with the bedplate, as moved away from its normal position;

Fig. 6 is a vertical section on the line C-C of Fig. 3;

Fig. 7 is a vertical section on the line DD of Fig. 3, and showing inparticular the cam drive with the two cams in side elevation;

- Fig. 8 is a vertical section on the line E-E of Figures 3 and 4:, andshowing in particular the pattern cams in section;

Fig. 8' is a plan view of one of the disks containing the pattern cams,the under cam only being shown in dotted lines;

' Fig, 9 1s a vertical sectional view on the line F.F of Figures 3 and4:;

Fig. 10 is a perspective view of the driving elements in the frame andbearings f6r the upper and lower sewing elements;

Figures 11, 12 and 13 are details of the loopretainer operating means;

Fig. 14 is a perspective view of the driving elements without the frameand bearings for the upper and lower cutting devices Fig. 15 is avertical sectional view showing the driving link connection forimparting vertical movement to the cutting blade;

Fig. 16 is a horizontal sectional view showing the same;

Fig. 17 is a vertical sectional view showing the lower or stationaryknife and the means for rotating the same;

Fig. 18 is a plan view of the same;

Fig. 19 is a vertical sectional view through the presser foot and thefeed dog and showing the upper and lower cutting elements;

Fig. 20 is a view partly in section and partly'. in plan of the partsshown in Fig. 19, also showing the fabric and the manner of cutting andattaching the same;

Fig. 21 is a diagrammatic view showing the fabric being trimmed with theknife at its extreme distance from the line of feed;

Fig. 22 is a similar view showing the trimmed edge as covered with theknife at its nearest point to the line of feed and in the thread loopsin the covering of the under edge of the fabric;

Fig. 46 is a view of the under side of the stitch;

Fig. 47 is a perspective view of the interlooped threads which cover theedge of the material;

Figures 48 to 50, inclusive, show in.t0p plan view the looper threadcontroller with the looper in various positions of its movements;

Fig. 51 is a view in side elevation of the means for operating thethread hook'for forming the looper in the upper cross thread,

and

Fig. 52 is a plan view of the same.

The machine in which the invention is embodied consists of a frame 1which includes a supporting base a, a standard I) and an overhanging-armc. Mounted on the base a is a cloth plate (Z. At the outer end of theoverhanging arm 0 is a needle head. These parts are of the usualconstruction. Mounted on the supporting base a is a main shaft 2 whichcarries a belt wheel 3. Mounted in the overhanging arm and extendingthrough the standard 5 is an upper shaft 4:. The shafts 2 and i areprovided with a series of cranks 5, and links 6 connecting said cranksimpart positive rotation to the upper shaft from the lower shaft.Mounted to reciprocate in the needle head (1 is a needle bar 11carrying, in the present embodiment of the invention, two needles 66,66. Cooperating with these needles 66, 66 beneath the cloth plate, is athread carrying looper 21. Associated with this thread carrying looper21 is a loop retainer 41. Cooperating with the needles above the clothplate is a thread hook 12, and associated with this thread hook 12-is afixed thread guide 18 In order that the material may be trimmed inadvance of the stitching mechanism and prior to the covering of the edgethereof, the machine is provided with a cutting blade 48, which ismounted so as to move up and down relative to the cloth plate. Cooper-.ating with this movable blade 48 is a stationary cutting blade 106.

The needle bar 11 is reciprocated from the shaft 4- by means of a head 7fixed to the shaft in which is mounted a vstud 8. Attached to the stud 8is a link 9 which. carries a sleeve adapted to engage a stud 8 attachedin turn to a rectangular sleeve 10 fixed to the needle bar 11. The stud8 can move in the sleeve of the link 9, and this provides an arrangementwhereby the needle bar 'may be shifted laterally without disturbing itsoperating connection with the shaft 4.

The thread laying device 12 is oscillated through the up and downmovements of the needle bar 11, and this is accomplished by providingthe rectangular sleeve 10 with an obliquely toothed rack 13, whichengages the toothed segment 14 securedto the shaft 15. The thread hook12 is fixed to a bracket arm 16, which is secured to the lower end ofthe fixed to the shaft 15, and the arm 16 carrying the thread hook isfixed to said shaft, the

thread hook will be oscillated by the vertical reciprocations of theneedle bar. Associated with this thread hook is a thread guiding arm 18carried by the-block 18 which .is secured to and is a part of the arm 18which is rigidly attached to the bearing sleeve for the shaft 15. Thethread guide 17? for the cross thread is attached. to an arm 17 which inturn is rigidly attached to the bearing sleeve for the shaft 15. Thesethread guides 1'?" and 18 are stationary, but they are adjustablerelative to each other and to the thread hook.

The feed dog 27 is carried by the feed bar 30 which is pivoted at itsrear end to the feed rocker 29. This feed rocker carries the long arm 28to which an eccentric strap is at tached, which strap cooperates with aneccentric 26 on the main shaft 2. As the main shaft rotates, it willrock the feed rocker, and this will move the feed bar back and forth.

The feed bar is raised and lowered by an ecmovement in the followingmanner. The

looper carrier is pivoted to a looper support by a pivot bolt 37. Thelooper support 38 carries a bifurcated arm 39 which cooperates with aneccentric 40 on the main shaft 2.

The loop retainer 41 is given a movement lengthwise of the looper, andacross the looper. This loop retainer 41 is carried by a 11, .whichstraddles a pin 45 mounted in a head attached to the outer end of theshaft 45. The pin 45 is slabbed intermediate its ends so that the forkedarm of the rock lever straddles the same.

The loop retainer is moved laterally of the looper by an eccentric'47which cooperates with a bifurcated arm 46 attached to the shaft 45. Thethread retainer is so timed relative to the looper, that when the looperstarts on its forward movement to enter the two needle 20 thread loopsone after another, the retainer is retracted and backed out of the wayof the movement of the looper. retainer is indicated in Figures 26 and29,. and in Fig. 26, I have also shown the path of movement of thelooper. As the looper approaches the forward end of its stroke, the loopretainer moves across the path of the looper and is retracted so as toengage the needle thread loops on the looper, as shown in Figures 33 and34. The thread retainer passes underneath the looper thread and holdsthe two thread loops back on the looper, so that the needles when theydescend, will pass with certainty into the thread triangle bounded bythe looper'thread extending from the eye of the looper to the previousstitch, the body of the looper and the needle thread loops on thelooper, and also extending to the previous stitch. Both needles enterthe same thread triangle. Attention is called to the fact that theneedle thread loops are locked by the looper thread loop, and thus it isthat there is an interengagement'of the thread loops which makes astitch which is more or less elastic and one in which the threads arenot liable to break if the edge which is covered by the threads is putunder a strain. The manner of forming the upper thread loops is shown indetail in Figures 36 to 46. The cross thread running through the threadguide 18 is engaged by the oscillating hook 12, and is carried in loopform across so that the left-hand needle only penetrates this loop,while the thread of the right-hand nee The path of the Fig. 47 I haveshown in perspective merely the stitching threads, and it will be veryapparent fromthis figure how the edge covering is made up of interlockedthread loops.

The upper trimmer blade 48 is moved up. and down by a connection with aneccentric 45) on the upper shaft 4 of the machine. Cooperating with thiseccentric 49 is an eccentric strap 50 which is connccted'to a ball stud64 adjustably mounted in the slot 63 of an arm 51, and the arm 51 isattached to the shaft 52. The eccentric strap through the connectionstated, oscillates the shaft 52. The shaft 52 is journaled in a bearingbracket member 53 in which the shaft 54 is mounted. This shaft 54carries an arm 126 at its lower end, and a cutting knife 48 is clampedto ahead 1 at the lower end of said arm 126. At the outer end of theshaft 52 there is a lever 55. ()n the shaft 54 is a collar 56 whichcarries a pin 57. This collar is free on the shaft 54. On the pin 57 isavsleeve Gigs-provided with a spherical enlargement 62. The lever 55engages this spherical enlargement. Vhen the shaft 52 is oscillated, itwill, through the lever 55, reciprocate the shaft 54 carrying thecutting blade 48. On the other side of the bracket bearing member 53 isa collar 58 which is attached to the shaft 52, which prevents anyendwise movement of the rock shaft 52 in said bearing 53.

The shaft 54 carrying the cutting blade 48 is capable of limitedrotation for properly positioning the knife for the cutting of thescallop in the fabric being stitched. This shaft 54 is oscillated by agear wheel 59 which is fixed to the shaft. A rack bar 113 carried by arod 112 oscillates the shaft 54. By adjusting the ball stud 64 in theslot 63, the extent of reciprocation imparted to the knife 48 may beadjusted. This enables the knife to be properly rcciprocated fordifferent thicknesses of fabric beingstitched. Cooperating with themovable trimming blade 48 isafixedtrimming blade 106. This fixed blade106 is mounted on a segment 110 which is pivotally supported by a throatplate 67 The center of its pivotal support coincides with the axis ofthe shaft 54 carrying the uppercutting blade. The segment 110 isoscillated by means of a rack 105. The purpose of rotating the knives ofthe cutting mechanism is so that the knives may be properly positionedfor following the curved edge of a scallop. This will be referred tofurther in connection with the means which controls the position of theknives.

The entire stitching mechanism and the trimming mechanism are mounted sothat they may be shifted laterally relative to the line of feed, andthis is for the purpose of forming the curved scallops, although thefabric is fed forward in a straight line. The needle bar 11 and theshaft 15 carrying the thread hook are both mounted in a bracket 83, andthis bracket 83 is supported by a rod 82 which is mounted to reciprocatein a direction parallel with the upper shaft 4, as clearly shown in Fig.39f the drawings. When this.

rod 82 is moved endwise, it will bodily shift the needle mechanism andthe cross thread laying mechanism, and as above noted, the needle isconnected to its reciprocating head 7 so that this lateral movement ispermitted. Inasmuch as the cross thread is actuated by the needle bar inits up and down movements, it can also be moved laterally without in anyway disturbing its actuating means. looper mechanism is mounted onvabearing block 75. This bearing block 75 also carries a throat plate 67.The looper retaining mechanism is likewise mounted on this bearing block75, and the bearing block 75 is capable of being shifted laterally, soas to prop erly position the looper to cooperate with the needles intheir various shifted positions. The stitching mechanism and the cuttingmechanism are shifted laterally relative to the feed, and the cuttingmechanism is rotated for changing its angular position by pattern camsshown in Figures 8, 9,10 and 14 of the drawings. The movements may bebroken up into three distinct groups. First, the

lateral movements of the needle, the throatplate and the looper arecontrolled by devices shown in Figures 8, 9 and 10; second, the lateralmovement of the cutting-devices and controlling devices shown in Figures8, 9 and 14; andthird, the rotating movements of the cutting devicescontrolled by members shown in Figures 8, 9 and 14. The pattern cams areformed in two disks 115 and 116, and these disks and the work wheel 117are all fastened to a sleeve 118 journaled on a fixed shaft 119. A worm120 on the main shaft 2 meshes with the worm wheel and rotates thedisks. In the lower disk 115 there is a cam groove 68 (see Fig. 8). Thiscam groove controls the lateral position of the needles, the throatplate, the looper-and the upper cross thread laying hook. Journaled insuitable bearings attached to the frame of the machine, is the shaft 65.Fastened to the lower end of the shaft 65 is a rock lever 69. An arm 69of said rock lever carries a roller 70 which runs in the camgroove 68.The other arm 69 of this rock lever is connected at 71 to apush rod 72,and the push rod 72 is connected. at 73 to a ball stud 74 which isfastened to the looper bearing block 75. As above noted, this looperbearing block 7 5 carries the looper and the loop retainer and also thethroat plate, so that when the block is shifted through the rotation ofthe cam 68, the looper, the retainer and the throat plate will all beshifted therewith. On the upper end of the shaft 65there is an arm 76which is connected to a thrust rod 77 (see Fig. 10). The thrust rod 77is connected to'the upper arm 78 by a bifurcated lever 78 which is freeto rock upon its supporting shaft 79. The

The

. lower arm 78 of said bifurcated lever is conhanging arm as abovereferred to. It is understood that the supporting rod 82 does notinterfere in any way with the reciprocations of the needle bar 11. Whenthe shaft 65 is oscillated, this supporting rod 82 is moved endwise, andwith it, the supporting bracket in which the needle barreciprocates andin which the shaft 15 carrying the cross thread laying hook oscillates.Thus it is that the cam 68 shifts step bystep the position of thestitching mechanism, that is, the needle, the looper and the crossthread laying mechanism, and also the throat plate. This step by stepshifting of the stitching elements occurs when the needles are out ofthe material, and is the movement of the stitching mechanism relative tothe material. In other words, the material is-fed forward in a straightline and the stitching mechanism is gradually shifted in a directionat'right angles to the line of feed. The upper cam groove 84 is for thepurpose of shifting the cutting devices laterally relative to the lineof feed. Mounted on the shaft 65 is the inner-sleeve 101 and the outersleeve 85. These sleeves are free to oscillate independent of eachother, and independent of the shaft 65. Mounted on the outer sleeve is atwo-armed lever 86'. The

arm 86 of this lever carries a roller 87 which runs in the camgroove 84.The arm 86 of said lever is attached to a link 89 and this link 89 is inturn connected to a rock frame 91. The rock frame 91 is connected toalink or thrust rod 90, which is provided with a head 92 attached to apivot 93 carried by. a knife toa hall stud on a collar 98 which is fixedtothe rod 96. This rod 96 is attached to the" bracket 53 in which theshaft 54 is mounted. There is an extension 96 ofthe rod 96 also attachedto the bracket, and this 'rod 96 and extension 96 are mounted to slidefreely in the overhanging arm of the machine. When the sleeve shaft 85is oscillated by the cam 84, the lower knife support 88 is shifted andthe bracket 53 for the upper knife is likewise shifted. They are bothshifted to the same extent, and this shifting of the cutting devices isin adirection at right angles to the line of feed. It is noted that theshifting of the cutting devices is accomplished by a mechanism which isindependent of the mechanism for same so as to position the cut edgeproperly relative to the over-edge stitching devices.

In order that the cuttingknives ma be adjusted as to the cuttingdirection, t ey are capable of being rotated, as has been explainedabove. This rotation of the cutting knives is controlled by the cam 99in the under side of the disk 116. The intermediate sleeve shaft 101carries a two-armedlever 100. The lever arm 100 of the lever 100 isprovided with a roller which engages the,

cam groove 99. The other arm 100 of the lever 100 is connected to a link104, and this link in turn is connected to the rack bar 105 whichrotates the support for the lower cutting member 106. In order that thestationary member 106 may be held with some pressure against thevertically reciprocating knife 84, I have provided a spring connectionbetween the link 104 and the rack bar 105. Mounted on the link 104 is afixed collar 109 and a fixed collar 109. The rack bar 105 is providedwith collars 108 and 108, which pass freely along the link 104. A spring107 encircles the link 104 and bears at one end against the collar 108,while its other end bears against the collar fixed to the link 104.There is suflicient room between the collars fixed to the link 104 andthose movable thereon, that the spring 107 will continually urge therack bar to the right as viewed in Fig. 14,

and this brings about a yielding pressure of the knife 106 against thevertically reciproeating knife 48. I have referred to the knife 106 asthe stationary knife, in view of the fact that it has no movement duringthe cutting of the fabric. It is, however, shiftable bodily and capableof being rotated as noted above. There is a cover plate 111 attached tothe support 88 for the lower knife which serves as a housing for therack bar 105. Also mounted on the central sleeve shaft 101 is an arm102. Connected tothe arm 102 is a link 112, and this link 112 carries arack bar 113 which engages a pinion 59 fixed tothe shaft 54 carrying themovable cutting blade 48.

From the above it will be apparent that a when the disk 116 is rotated,the lever 100 will be oscillated by the roller thereon running inthe camgroove 99. This cam groove is so shaped that the central sleeve shaft101 is gradually shifted or oscillated inone direction for the purposeof changing the angular positionof the knife, and when the point 99 isreached in the pattern cam groove 99, the oscillatinglever will bequickly returned to its normal starting point. The parts are so timedthat when the cutting knife is at the beginning of the forming of ascallop, (see Figures 20 to 23), the lmife will be set at such an angleas to follow the curved edge of the scallop which is out. When the end iof the scallop is reached, as shown in Fig. 22,

by the usual hand lever 125. The fabric is indicated at 124 in thedrawings, and the presser foot bearing upon this fabric, will hold it inproper relation to the feed dog,

so that the feed dog in each cycle of movement will feed the fabricforward in a straight line. The cutting of the edge of the fabric inscallops is accomplished by the lateral movements of the trimming knife,and the rotating movements of the trimming knife .is for the purpose ofcausing the cutting blades toface in the proper direction for outtingthe fabric. The stitch forming mechanism is moved laterally so as tofollow the out edge, and thus it is that the fabric is trimmed so as toprovide a series of scallops, and simultaneously with the cutting of thefabric to form the scalloped edge, said edge is covered with interlockedthread loops. The thread loops are all uniformly interlocked andtherefore, the edge is very uniform when it is finished, and as abovestated, it is more or less elastic, due to the fact that thecoveringstitches are all interlocked loops. It will be understood, ofcourse, that by changing the length of feed, the pattern of the scallopsmay be shortened or lengthened, and if the depth of the scallop is to bevaried by changing the extent of lateral movement of the cutting devicesand stitching elements, this is accomplished by changing the patterncams.

The looper thread on its way to the looper passes through a threadcontrolling mechanism which 1s shown in detail in Fig. 10, and which isshown also in Figures 48 to 50, inclusive. This thread controllingmechanism includes nipper springs 22 and 23 which are closed during thereturn movement of the looper 21 for clamping the looper thread. Thelooper thread cam 24 engages the looper thread between the thread clampand the looper, and associated with this cam 24 is the usual cast-offfinger 25. This mechanism is of the usual construction as noted above,and further description thereof is not thought necessary.

It will be obvious that minor changes in the details of construction maybe made with out departing from the spirit of the invention'as set forthin the appended claims.

Having thusdescribed the invention, what I claim as new and desire tosecure by Letters Patent, is- I 1. The combination of a stitch formingmechanism including cooperating elements forming edge covering stitchesby enchaining thread loops, a cutting mechanism in advance of thestitching elements, means for-feeding the fabric in substantially astraight line, and means for imparting a lateral movement to thestitching and cutting mechanisms relative to the feed of the fabric andwhile the fabric is being fed for festooning the edge of the fabric,said cutting mechanism including means for shifting the position of thecutting devices angularly so as to follow the curved edge of the fabricas it is cut.

2. The combination of a stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements, means forfeeding the fabric in a straight line, and means for shifting thestitching elements and the cut ting devices laterally of the line offeed for festooning the edge of the material, said cutting mechanismincluding means for shifting the position of the cutting devicesangularly so as to follow the curved edge of the fabric as it is out. 1

3. Thecombination of a stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements, means forfeeding the fabric in a straight line, and means for shifting thestitching elements and the cutting devices laterally of the line of feedfor festooning the edge of the material, said cutting mechanismincluding means whereby the cuttingdevices may beturned so as to followthe curve of the festooned edge as the fabric is cut.

4. The combination of a stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements, means forfeeding the fabric in a straight line, and means for shifting thestitching elements and the cutting devices at right angles to the lineof feed for festooning the edge of the material, said means for shiftingthe stitching elements being operated independently of the means forshifting the cutting devices so that the stitching elements may beproperly placed for covering the cut edge.

5. The combination of stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements including areciprocating cutting blade and a. relatively stationary cutting blade,means for feeding the fabric in a straight line, means for bodilyshifting the stitching elements in a direction at right angles to theline of feed, and independent means for shifting the cutting mechanismlaterally in a, direction at right angles to the line of feed, saidshiftin devices being so timed that the edge 0 the fabric is cut to formscallops and the cut edges covered by the stitching mechanism.

6; The combination of stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements including areciprocating cutting blade and a relatively stationary cutting blade,means for feeding the fabric in a straight line, means for bodilyshifting the stitching elements in a direction at right angles to theline of feed, said shifting devices being so timedthat the edge of thefabric is cut to form scallops and the cut edges covered by thestitching mechanism, said cutting mechanism including means whereby thecutting devices are shifted angularly so as, to follow the curvedcutting edge of the fabric.

7. The combination of stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements including areciprocating cutting blade and a relatively stationary cutting blade,means for feeding the fabric in a straight line, means for bodilyshifting the stitching elements in a direction at right angles to theline of feed, said shifting devices being so timed that the edge of thefabric is cut to form scallops and the cut edges covered by thestitching mechanism, said means for shifting the cutting mechanism beingindependent of the means for shifting the stitching elements so that thestitching elements may be properly positioned for covering the cut edge.

8. The combination of stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements, a feedingamechanism for feeding the fabric in a straight line, means for shiftingthe cutting mecha- IllSIIl lIlCllldlllg' a pattern cam, devicescontrolled thereby for shifting-laterally of the line of feed, both theupper cutting device and the lower cutting device, and means for shiftinthe stitch forming elements to cor respon with the lateral shift of thecutting mechanism so that a scalloped edge may be formed and coveredwith stitches.

9. The combination of stitch forming mechanism including cooperatingelements forming edge covering stitches by enchaining thread loops, acutting mechanism in advance of the stitching elements, a feedingmechanism for feeding the fabric in a straight line, means for shiftingthe cutting mechanism including a pattern cam, devices controlledthereby for shifting laterally the line of feed, both the upper cuttingdevice and the lower cutting device, means for shifting

